till there gone ... just joking !! As Matt offered, do not place in extreme heat or cold as they will reduce lifespan. I have one bottle of the original FP that is 5 years old and still looks good.
It might be overkill, but I keep my 32oz bottles in my house but my 8oz bottles stay in the garage with all my other detail supplies...At least my 'stock' stays at a constant temp. Probably not necessary though.